"Spy" is a digital single by South Korean boy band Super Junior.

It is the second promotional single for the group's sixth studio album Sexy, Free & Single and title track of the repackaged edition, titled Spy.

It samples a selection from the 1995 TV series "Get Smart".

On 3 August, the teaser for the "Spy" music video was released on their official YouTube channel, and the music video was released on August 12.

[3] The group made their "Spy" stage debut on 9 August on Mnet's M!